Switched to FastNoise

world/src/block/mod.rs

@@ -171,31 +171,18 @@ impl<'a> BlockGen<'a> {
                 (true, alt, CONFIG.sea_level /*water_level*/)
             } else {
                 // Apply warping
-                let warp = (world
-                    .sim()
-                    .gen_ctx
-                    .warp_nz
-                    .get((wposf.div(Vec3::new(150.0, 150.0, 150.0))).into_array())
-                    as f32)
+                let warp = (world.sim().gen_ctx.warp_nz.get(wposf.div(16.0)) as f32)
                     .mul((chaos - 0.1).max(0.0))
-                    .mul(96.0);
+                    .mul(15.0);
 
                 let height = if (wposf.z as f32) < alt + warp - 10.0 {
                     // Shortcut cliffs
                     alt + warp
                 } else {
                     let turb = Vec2::new(
-                        world
-                            .sim()
-                            .gen_ctx
-                            .turb_x_nz
-                            .get((wposf.div(48.0)).into_array()) as f32,
-                        world
-                            .sim()
-                            .gen_ctx
-                            .turb_y_nz
-                            .get((wposf.div(48.0)).into_array()) as f32,
-                    ) * 12.0;
+                        world.sim().gen_ctx.fast_turb_x_nz.get(wposf.div(16.0)) as f32,
+                        world.sim().gen_ctx.fast_turb_y_nz.get(wposf.div(16.0)) as f32,
+                    ) * 8.0;
 
                     let wpos_turb = Vec2::from(wpos).map(|e: i32| e as f32) + turb;
                     let cliff_height = Self::get_cliff_height(

world/src/sim/mod.rs

@@ -12,7 +12,7 @@ use self::util::{
 use crate::{
     all::ForestKind,
     generator::TownState,
-    util::{seed_expan, Sampler, StructureGen2d},
+    util::{seed_expan, FastNoise, Sampler, StructureGen2d},
     CONFIG,
 };
 use common::{
@@ -75,7 +75,7 @@ pub(crate) struct GenCtx {
     pub small_nz: BasicMulti,
     pub rock_nz: HybridMulti,
     pub cliff_nz: HybridMulti,
-    pub warp_nz: BasicMulti,
+    pub warp_nz: FastNoise,
     pub tree_nz: BasicMulti,
 
     pub cave_0_nz: SuperSimplex,
@@ -84,6 +84,9 @@ pub(crate) struct GenCtx {
     pub structure_gen: StructureGen2d,
     pub region_gen: StructureGen2d,
     pub cliff_gen: StructureGen2d,
+
+    pub fast_turb_x_nz: FastNoise,
+    pub fast_turb_y_nz: FastNoise,
 }
 
 pub struct WorldSim {
@@ -117,7 +120,7 @@ impl WorldSim {
             small_nz: BasicMulti::new().set_octaves(2).set_seed(gen_seed()),
             rock_nz: HybridMulti::new().set_persistence(0.3).set_seed(gen_seed()),
             cliff_nz: HybridMulti::new().set_persistence(0.3).set_seed(gen_seed()),
-            warp_nz: BasicMulti::new().set_octaves(3).set_seed(gen_seed()),
+            warp_nz: FastNoise::new(gen_seed()), //BasicMulti::new().set_octaves(3).set_seed(gen_seed()),
             tree_nz: BasicMulti::new()
                 .set_octaves(12)
                 .set_persistence(0.75)
@@ -135,6 +138,9 @@ impl WorldSim {
                 // .set_octaves(6)
                 // .set_persistence(0.5)
                 .set_seed(gen_seed()),
+
+            fast_turb_x_nz: FastNoise::new(gen_seed()),
+            fast_turb_y_nz: FastNoise::new(gen_seed()),
         };
 
         // "Base" of the chunk, to be multiplied by CONFIG.mountain_scale (multiplied value is

world/src/util/fast_noise.rs

@@ -0,0 +1,47 @@
+use super::{RandomField, Sampler};
+use std::f32;
+use vek::*;
+
+pub struct FastNoise {
+    noise: RandomField,
+}
+
+impl FastNoise {
+    pub const fn new(seed: u32) -> Self {
+        Self {
+            noise: RandomField::new(seed),
+        }
+    }
+
+    fn noise_at(&self, pos: Vec3<i32>) -> f32 {
+        (self.noise.get(pos) % 4096) as f32 / 4096.0
+    }
+}
+
+impl Sampler<'static> for FastNoise {
+    type Index = Vec3<f64>;
+    type Sample = f32;
+
+    fn get(&self, pos: Self::Index) -> Self::Sample {
+        let v000 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(0, 0, 0));
+        let v100 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(1, 0, 0));
+        let v010 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(0, 1, 0));
+        let v110 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(1, 1, 0));
+        let v001 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(0, 0, 1));
+        let v101 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(1, 0, 1));
+        let v011 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(0, 1, 1));
+        let v111 = self.noise_at(pos.map(|e| e.floor() as i32) + Vec3::new(1, 1, 1));
+
+        let factor = pos.map(|e| 0.5 - (e.fract() as f32 * f32::consts::PI).cos() * 0.5);
+
+        let x00 = Lerp::lerp(v000, v100, factor.x);
+        let x10 = Lerp::lerp(v010, v110, factor.x);
+        let x01 = Lerp::lerp(v001, v101, factor.x);
+        let x11 = Lerp::lerp(v011, v111, factor.x);
+
+        let y0 = Lerp::lerp(x00, x10, factor.y);
+        let y1 = Lerp::lerp(x01, x11, factor.y);
+
+        Lerp::lerp(y0, y1, factor.z) * 2.0 - 1.0
+    }
+}

world/src/util/mod.rs

@@ -1,3 +1,4 @@
+pub mod fast_noise;
 pub mod hash_cache;
 pub mod random;
 pub mod sampler;
@@ -7,6 +8,7 @@ pub mod unit_chooser;
 
 // Reexports
 pub use self::{
+    fast_noise::FastNoise,
     hash_cache::HashCache,
     random::{RandomField, RandomPerm},
     sampler::{Sampler, SamplerMut},